// Copyright 2013 Traceur Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import {ParseTreeVisitor} from '../syntax/ParseTreeVisitor';
import {isStrictKeyword} from '../syntax/Keywords';

/**
 * This matches the "Static Semantics: BoundNames" in the ES6 spec.
 */
export class StrictParams extends ParseTreeVisitor {

  /**
   * @param {ErrorReporter} errorReporter
   */
  constructor(errorReporter) {
    super();
    this.errorReporter = errorReporter;
  }

  visitBindingIdentifier(tree) {
    var name = tree.identifierToken.toString();
    if (isStrictKeyword(name)) {
      this.errorReporter.reportError(tree.location.start,
                                     `${name} is a reserved identifier`);
    }
  }

  static visit(tree, errorReporter) {
    new StrictParams(errorReporter).visitAny(tree);
  }
}

